A system for air handling, the system includes a pipe comprised of plastic having an oval cross-section. The system may further include a register boot comprised of plastic having a main body with a first opening and a second opening wherein the first opening has an oval cross-section for connection with an oval pipe and wherein the second opening is generally rectangular for fitting a register cover. The system may further include a fitting having a first end and a second end, the first end having a round opening and a second opening having an oval cross-section and a main body between the first end and the second end. The main body may be sized and shaped such that the round opening is presented orthogonally to the second opening. The system may further include a t-fitting having a first segment with a first opening attached to a second segment orthogonal to the first segment, the second segment having first and second opposite openings.

A fitting assembly for connection to a flexible duct includes a ferrule configured for insertion into an open end of the flexible duct a fitting removably connected to the ferrule. The ferrule includes a sidewall defining a minor diameter and a major diameter spaced apart from the minor diameter, and a ferrule thread extending radially outward from the sidewall. One of the fitting and the ferrule defines a recess. Another of the fitting and the ferrule comprises a tab configured to extend into the recess. One of the recess and the tab comprises an edge. Another of the recess and the tab comprises a ramped surface extending in a circumferential direction of the ferrule, such that rotation of the ferrule relative to the fitting causes the ramped surface to engage the edge, thereby radially deflecting the tab and disengaging the tab from the recess.

A portable enclosure is configured to mix room air with a controlled amount of exterior air via one or more flexible conduits disposed between the enclosure and an exterior window. At least one flexible conduit is connected to a barrier structure which is designed for sealable placement within the window. One or more mixing dampers are employed to control the amount of exterior air supplied to the enclosure. An air moving device delivers exterior air in controlled amounts to the enclosure which is designed to be moveable so that a more desirable (fresher, cooler, and more contaminant free) stream of air is deliverable to the personal space of an occupant to satisfy ventilation and temperature requirements.

Suspension system for supporting an inflatable air duct includes at least one support bracket arranged to support the inflatable air duct, the at least one support bracket being suspendable, wherein the at least one support bracket includes a first bracket component arranged to support a first side of the inflatable air duct; and a second bracket component arranged to support a second opposite side of the inflatable air duct. A first end of each of the first and second bracket components has a plurality of bends so as to provide at least one holding point to prevent the first and second bracket components from rotating in opposite direction towards each other around an axis in parallel with a longitudinal direction of the inflatable air duct.

A vaneless ventilation system includes a rigid duct and a vent assembly in fluid communication with the duct. The vent assembly includes a rigid housing defining an outlet, a bendable duct disposed inside the rigid housing, a linkage assembly coupled to the bendable duct to allow deflection of the bendable duct upon movement of the linkage assembly, and an actuation mechanism coupled to the linkage assembly, wherein actuation of the actuation mechanism causes the linkage assembly to move, thereby deflecting the bendable duct.

A low pressure duct configured to channel a gas within a structure includes a tubular body formed from a polymer foam material, and a first plurality of strands adhered to a surface of the tubular body along a plurality of paths. The plurality of paths includes a first set of paths oriented longitudinally along the tubular body. The first set of paths are spaced apart from each other around a circumference of the tubular body. The plurality of paths also includes a second set of paths oriented circumferentially around the tubular body. The second set of paths are spaced apart longitudinally along the tubular body.

A ventilation device is supported in at a ventilation opening in a fabric panel of a building in which the fabric panel is supported under tension across a frame. The device includes a lower frame and an intermediate frame with respective flanges that receive a perimeter edge of the fabric panel about the ventilation opening therebetween. A cover is joined to the frames so as to prevent precipitation entering the frame opening while providing exterior ventilation from the ventilation opening of the building through one or more exterior openings in the cover.

Example air duct assemblies include an air duct including a tubular sidewall that is pliable, the tubular sidewall defining an interior of the air duct, the air duct elongate in a longitudinal direction. Example air duct assemblies include a hoop disposable within the interior of the air duct, the hoop providing the sidewall with support in a radial direction that is substantially perpendicular to the longitudinal direction. Example air duct assemblies include a cable disposable within the interior of the air duct, the cable to extend along a longitudinal length of the air duct, the cable to engage the hoop to help support a weight of the hoop and the tubular sidewall.

A portable enclosure is configured to mix room air with a controlled amount of exterior air via one or more flexible conduits disposed between the enclosure and an exterior window. At least one flexible conduit is connected to a barrier structure which is designed for sealable placement within the window. One or more mixing dampers are employed to control the amount of exterior air supplied to the enclosure. An air moving device delivers exterior air in controlled amounts to the enclosure which is designed to be movable so that a more desirable (fresher, cooler, and more contaminant free) stream of air is deliverable to the personal space of an occupant to satisfy ventilation and temperature requirements.

A duct system is formed from a plurality of tubular sections each formed from a flexible panel with tapering sides. Inner and outer joiner plates are attached to one side edge and the second side edge is inserted in the recess between the plates and fastened such that each section has a first open end and a second slightly larger open end. Anchors are spaced around each end of each tubular section. The first end of each tubular section is inserted into the larger second end of an adjacent tubular section and an end pulling element is connected between the anchors on adjacent sections an operated to draw the connected first and second anchors together to make a substantially air tight seal between the tubular sections.